Piston.



E. T. ALLEN.

PISTON. L APPLICATION FILED MAYZI, 1912. 1,045,930, Patented Deo. 3, 1912.

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Loesgoso `Speecation o Letters Patent. Patienten@ Dein E.; 19312.

Application ziled May i3 I Serial No. 598,756'.

and state of Mieliioan have invented. eertain new and useful improvements in Pistons; and I do hereby declare the :following to be full, elearVanel-exaet description of the invention, snelas will enable' others skilled in the art to which it appertains to make enel use the saine.

lChis invention relates to pistons, and. it more particulariy relates to piston rings to a novel form of spring associated there with.7

An object of the invention is .to provisie piston rings in connection with s piston of ordinary eo'nstru on, whereby steam, ges and the l'le is prevented from escaping said rin A iurtier object is to provi/le means as soeiatefl with piston rings for preventing rattling and lmoelnng of the same A still further ooge/ot 1s to prow/lele a novel device of the-character described which may be applied to an ordinary piston and piston rings, without the necessity for the addition of complicated parte, and at a moderate pense.

A still. further object is to provide means wherehj,7 the piston rings may loe easily moved anal reglas-esl, without removing piston from the engine. cylinclen Other objects advantages may be the olor,

is shown at i iston rings l2 seated, in the usual n" nner in the channel Q. Each ai the piston L ngs .is rovided with one or more arcuate or eirenlar grooves 13, and, seated these grooves5 is a series of suhstantially Z-shaped yspriiws le. The springs le are preferably formed of steel wire or roel, although7 any proper material may be einployeel in 'their construction. The form of the sgaring rnernlser may be desoribef ase1 three integral elongated sections of metal having their Centers on one Common are of a `circle. The sprinffs magT also be described as a length of metal bent upon itself in two places so as to forno. two outer substantiallgvT parallel elements and an intermediate element standing at an angle to the outer elements, The grooves or spring seats 13 are nreferaaly circular as shown, having the o he piston as their Center, but I elo not linen my invention to this exact forma- 'tionu ln piaetice, two or more piston rings l2 are provided with opposing spring seats 13, and one of my improved piston ring springs is seateoA in each two opposing spring seats.

lt is well known, that there must be a certain amount of Slay between piston rings and the groove in which thejy7 are seated, lest they should stielr Within said groove7 thereby losing their lntility. New., as the piston rings beeome worn around their peripheries they move outward, by their own spring astio thereby leaving a Considerble in of jammed within the seat 8, because of the l resiliency of the spring element. lVhen the I piston rings become worn out, and it is desired to replace them with new ones, it is not essential to remove the piston from the y engine cylinder, i but it is only necessary to i remove the bolts ll and member 7-9, whereupon, the ringsv may be easily removed l and replaced. l lt is obvious that the device disclosed is l capable ot' attaining thel objects ascribed` thereto in' the foregoing, and in a thoroughly practicable and etlicient manner.

l do not limit my invention to the exact details of construction, combination and ar Q rangement of parts as recited and shown, but, my invention may only be limited by a l reasonable interpretation ol the following; claim. i I claim: ln an engine piston provided with a pisi ton ring seat7 a. pair of piston rings provided l Leeuwen with similar arcuate grooves, said piston rings being seated in the piston ring seat with said similar arcuate grooves opposite to each other, and a series ot' springs each comprising a length of wire bent upon itself so as to form three elongated segmental spring elements and being curved upon one common arc of a circle, said series of springs being seated within the opposite grooves in such relation as to extend an equal dis tance into each groove, said piston ring being held in spaced relation by said springs and being adapted for slight radial movement independently ot each other.

ln testimony wliei'eolE l have signed my name to this specification in the presence ol' two subscribing witnesses.

IEDVARD THEODORE ALLEN.

lVitnesses Jaimes RIDDELL, FRED. J. SMITHn 

